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Bioeconomic Sustainability and Resilience of Savanna

Author

Listed:
  • I V Yatat-Djeumen

    (University of Yaoundé [Cameroun])

  • Luc Doyen

    (CEE-M - Centre d'Economie de l'Environnement - Montpellier - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - Institut Agro Montpellier - Institut Agro - Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement - UM - Université de Montpellier)

  • J J Tewa

    (UMMISCO - Unité de modélisation mathématique et informatique des systèmes complexes [Bondy] - UGB - Université Gaston Berger de Saint-Louis Sénégal - UY1 - Université de Yaoundé I - Institut de la francophonie pour l'informatique - UCA - Université Cadi Ayyad [Marrakech] - SU - Sorbonne Université - IRD [Ile-de-France] - Institut de Recherche pour le Développement - UCAD - Université Cheikh Anta Diop de Dakar [Sénégal])

  • B Ghosh

    (University of Calcutta)

Abstract

Our paper investigates the bioeconomic sustainability and resilience of savanna social-ecological systems (SES). A stylized dynamics of an exploited grass-tree systems is thus considered accounting both for the competition between trees and grass along with logging and grass harvesting activities. Regarding sustainability, we rely on bioeconomic viability goals including consumption security for grass, profitability of logging and coexistence of tree-grass states. A first analytical result relates to the elicitation of sufficient sustainability conditions through the non-emptyness of the so-called viability kernel. Such sufficient conditions rely on coupled MSY (maximum sustainable yield)-MEY (maximum economic yield) reference states-controls. A larger viable set including these MSY-MEY equilibria is also identified. The resilience of such viability states-controls for savanna SES facing shocks such as fire is then put forward from both recovery through stability analysis and resistance viewpoints. Simulations inspired from savanna systems in Cameroon exemplify the analytical findings.

Suggested Citation

  • I V Yatat-Djeumen & Luc Doyen & J J Tewa & B Ghosh, 2024. "Bioeconomic Sustainability and Resilience of Savanna," Working Papers hal-04391328, HAL.
    • Handle: RePEc:hal:wpaper:hal-04391328
    Note: View the original document on HAL open archive server: https://hal.inrae.fr/hal-04391328v1
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